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# Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import functools
import os
import shutil
import sys
import tarfile
import time
import zipfile
import requests
lasttime = time.time()
FLUSH_INTERVAL = 0.1
def progress(str, end=False):
global lasttime
if end:
str += "\n"
lasttime = 0
if time.time() - lasttime >= FLUSH_INTERVAL:
sys.stdout.write("\r%s" % str)
lasttime = time.time()
sys.stdout.flush()
def _download_file(url, savepath, print_progress):
if print_progress:
print("Connecting to {}".format(url))
r = requests.get(url, stream=True, timeout=15)
total_length = r.headers.get('content-length')
if total_length is None:
with open(savepath, 'wb') as f:
shutil.copyfileobj(r.raw, f)
else:
with open(savepath, 'wb') as f:
dl = 0
total_length = int(total_length)
starttime = time.time()
if print_progress:
print("Downloading %s" % os.path.basename(savepath))
for data in r.iter_content(chunk_size=4096):
dl += len(data)
f.write(data)
if print_progress:
done = int(50 * dl / total_length)
progress("[%-50s] %.2f%%" %
('=' * done, float(100 * dl) / total_length))
if print_progress:
progress("[%-50s] %.2f%%" % ('=' * 50, 100), end=True)
def _uncompress_file_zip(filepath, extrapath):
files = zipfile.ZipFile(filepath, 'r')
filelist = files.namelist()
rootpath = filelist[0]
total_num = len(filelist)
for index, file in enumerate(filelist):
files.extract(file, extrapath)
yield total_num, index, rootpath
files.close()
yield total_num, index, rootpath
def _uncompress_file_tar(filepath, extrapath, mode="r:gz"):
files = tarfile.open(filepath, mode)
filelist = files.getnames()
total_num = len(filelist)
rootpath = filelist[0]
for index, file in enumerate(filelist):
files.extract(file, extrapath)
yield total_num, index, rootpath
files.close()
yield total_num, index, rootpath
def _uncompress_file(filepath, extrapath, delete_file, print_progress):
if print_progress:
print("Uncompress %s" % os.path.basename(filepath))
if filepath.endswith("zip"):
handler = _uncompress_file_zip
elif filepath.endswith("tgz"):
handler = functools.partial(_uncompress_file_tar, mode="r:*")
else:
handler = functools.partial(_uncompress_file_tar, mode="r")
for total_num, index, rootpath in handler(filepath, extrapath):
if print_progress:
done = int(50 * float(index) / total_num)
progress("[%-50s] %.2f%%" %
('=' * done, float(100 * index) / total_num))
if print_progress:
progress("[%-50s] %.2f%%" % ('=' * 50, 100), end=True)
if delete_file:
os.remove(filepath)
return rootpath
def download_file_and_uncompress(url,
savepath=None,
extrapath=None,
extraname=None,
print_progress=True,
cover=False,
delete_file=True):
if savepath is None:
savepath = "."
if extrapath is None:
extrapath = "."
savename = url.split("/")[-1]
if not os.path.exists(savepath):
os.makedirs(savepath)
savepath = os.path.join(savepath, savename)
savename = ".".join(savename.split(".")[:-1])
savename = os.path.join(extrapath, savename)
extraname = savename if extraname is None else os.path.join(extrapath,
extraname)
if cover:
if os.path.exists(savepath):
shutil.rmtree(savepath)
if os.path.exists(savename):
shutil.rmtree(savename)
if os.path.exists(extraname):
shutil.rmtree(extraname)
if not os.path.exists(extraname):
if not os.path.exists(savename):
if not os.path.exists(savepath):
_download_file(url, savepath, print_progress)
if (not tarfile.is_tarfile(savepath)) and (
not zipfile.is_zipfile(savepath)):
if not os.path.exists(extraname):
os.makedirs(extraname)
shutil.move(savepath, extraname)
return extraname
savename = _uncompress_file(savepath, extrapath, delete_file,
print_progress)
savename = os.path.join(extrapath, savename)
shutil.move(savename, extraname)
return extraname
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